Stepladder



Nov. 3, 1927. 1,648,844

O. FRISK STEPLADDERY Filed March 18. 1927 O m/arflewri WITNESS: WATTORNEY UNITED STATES PATENT OFFICE.

Application filed March 18, 1927.

This invention relates step ladders.

The primary OSKAR FRISK, 013

new YORK, N. Y.

STEPLADDEB.

to improvements in object of theinvention resides in a step ladder ofthe self supporting type and which may be adjusted for reaching arelatively great height, or in instances where a tall ladder could notbe erected, the

same may be folded to meet the occasion.

Another object of the a shorter height to invention is to provide a stepladder having supporting legs with added extensions lower step of theladder hinged thereto, the serving as a means for locking the extensionsof the front legs in an extended position wh the. ladder is desired andmay be folded back upon to reduce the height of the ladder when in arestricted place.

en the full length of which extensions the respective legs used Afurther object of the invention is the provision of a step ladder of thekind above mentioned which is simple in construction,

easy to adjust, and strong and durable for the purpose intended.

With these and other objects in view, the 1 invention resides in certainnovel construction and combinatlon and arrangement of parts, theessential fea tures of which are hereinafter fully described, areparticularly pointed out in the appended claims, and are illustrated inthe accompanying drawing, in

which Figure 1 is a perspective view of my improved step ladder in anextended position.

Figure 2 is a side elevational view of the ladder in a folded positFigure 3 is a detail sectional the removable step.

Figure 4. is a perspec movable step.

ion.

view through tive View of the rewhich includes spaced parallel front 11having steps 12 secured thereto.

legs 11, The top of the legs support a platform 13 and swing inglymounted to the platform is a prop 14 which includes space legs 15.Foldable brace bars 16 are connected to the prop and the front legs tolimit the separation of the same. Hingedly connec 11, 11 as at 17 are18.

ted to the front legs leg extensions or sections The hinges 17 arefastened to the outer side faces of the legs and leg sections with theknuckles or barrel of the hinges disposed above the bottom Of the es thathe a d Serial No. 176,460.

legs may rest fiat against the supporting surface. The lower legsections are braced by a removable step 19 which co-acts to lock thesections against outward swinging movement when in a set-up position.The ends of the step 19 are provided with cars 20 which extend throughaligned slots 21 provided in the lower leg sections. The ears areprovided with slots 22 for receiving wedge keys 23 which engage theouter side faces of the leg sections 18 for locking the step againstaccidental separation.

The legs 15, 15 of the prop are of the same length as the front legs 11and have leg sections or extensions 24: hinged thereto as at 25. Theknuckles or barrels of the hinges are disposed above the lower ends ofthe legs 15 to permit the legs to rest flat against a supporting surfacewhen the leg sections are in a folded position. For locking the jointbetween the legs 15 and the leg sections 24, I provide keepers 26 on thelegs 15 and the corresponding leg sections 24 and which keepers receivewedges 27 which bridge the joint th-erebetween and further serve tostrengthen the joint. The hinges 25 unlike the hinges 17 are mounted onthe inside edges of the legs 15 and the leg sections 24L so that the legsections may swing inwardly when in a folded position to lie flatagainst the leg sections 15.

When the leg extensions are extended into the position shown in Figure 1of the drawings and are locked by the wedges, the same provides a ladderof a relatively tall height for use when it is desired to reachcorresponding heights. However, should it be desired to set-uprelatively low ceiling, the leg sections 18 and 24 are folded back uponthe legs 11 and 15 as shown in Figure 2 of the drawing and are held insuch position by hooks 28 carried by the legs proper and which engageeyes 29 provided on the extensions. It will, of course, be understoodthat the wedges and step are first removed before swinging the sectionsto a folded position.

A ladder of this kind is especially adapted for household purposes andit will be found useful by painters, paper hangersand carpenters forworking in rooms where the average height ladder could not be erected.

What is claimed as new is auxil a y lee S ctions h ng to the l er theladder in a room having a Ice ends of said legs, a step removablysupported by said leg sections, ears provided on the ends of said stepfor passage through aligned slots provided in said leg sections, saidears 5 having slots therein, and wedges passing through said lastmentioned slots and engaging the sides of said leg sections,substantially as and for the purpose specified.

2. A step ladder comprising front and 10 rear legs movable to a positionin diverging relation to each other, extension legs hinged to thelowerends of the respective legs and foldabl-e thereagainst, the joint ofeach hinge being disposed inwardly from the lower end of the leg toallow the leg to rest fiat upon 3 a supporting surface when saidextension is folded, and locking means for holding said extensionlegsinco-extensive position with the respective front and rear legs.

In testimony- Whcreof I have aflixed my 20 signature. 7 r V OSKAR FRISK.

